Les propriétés optiques du hafnium dans l'ultraviolet à vide

The reflectance of hafnium was measured at five different angles of incidence in the spectral region from 500 to 1900 Å. By iterative calculations the centroid of the points of intersection of the isoreflectance curves was determined, thus yielding the complex index of refraction. Analysis of the optical constants indicates that interband transitions could be found near 7.3, 8.4, and 13.5 eV. A plasma peak is observed near 18.7 eV.